Answer: " 4 ,096 horses " .
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Explanation:
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 → " (4 ²) ³ * 4⁰  = ? " ; 
Note: " 4⁰ = 1 " ;
{Note the "zero exponent" property: " a⁰  =  1 " ; for: " a ≠ 0 " .}. 
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So; we can rewrite our problem as:
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 → " (4 ² ) ³ * 1 = ? " ; 
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Note that "any value" ; multiplied by: " 1 " ; results in "that same value" ; 
→ so; we can eliminate the: " 1 " ; and rewrite our problem as:
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 → " (4 ² ) ³ " . 
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To simplify: " (4² ) ³ = 4 ⁽ ² * ³ ⁾ " ; 
{Note the following property of integer exponents} : 
 → " (x ᵃ) ᵇ = x ⁽ ᵃ ᵇ ⁾ " . } .
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 → " 4 ⁽ ² * ³ ⁾ = 4 ⁶ " ; 
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 → " 4 ⁶  =  4,096 " . ← {Use calculator.}. 
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 → Or; 
 → " 4 ⁶  " =  " 4 * 4 * 4 * 4 * 4 * 4 " ; 
 = " (4 * 4) * (4 * 4) * (4 * 4) " ; 
 = " (16) * (16) * (16) " ;
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 Note the following calculations: 
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 ₃
 16 
 * 16
 _______
 ₁ 9 6
⁺  1 6  
  2 5 6 ;
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 ₃ ₃
 → 2 5 6 
 * 1 6 __
 ¹
 1 5 3 6
⁺ 2 5 6   
 4 0 9 6 .
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 → The answer is: " 4, 096 horses " .
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Or:  
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 "  4⁶  = 4 * 4 * 4 * 4 * 4 * 4 = ? " ;
 → " 4 * 4 * 4 * 4 * 4 * 4 ;
 = (4 * 4) * 4 * 4 * 4 * 4 ; 
 = 16 * 4 * 4 * 4 * 4 ;
 = (16 * 4) * 4 * 4 * 4 ;
 = (64) * 4 * 4 * 4 ;
 = (64 * 4) * 4 * 4 ;
 = (256) * 4 * 4 ;
 = (256 * 4) * 4 ; 
  =  (1,024) * 4 ; 
 =  1,024 * 4 ; 
  =  " 4 ,096 " .
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 The answer is: " 4 ,096 horses " .
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Alternate approach:
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 " (4 ² )³ = ? " ; 
 → Take the value in parentheses: " (4² = 4 * 4 = 16 ) " ; 
 → Rewrite as: " 16³ = ? " ; and solve using calculator; 
{or; "by hand" ; such as done above}:
 → Or: " 16³ = 16 * 16 * 16 = ? " ; 
 =  (16 * 16) * 16 ;
  =  (256) * 16 ; 
 = 256 * 16 ; 
 =  " 4,096 " .
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  → " 16³ =  16 * 16 * 16 =  4,096 " .
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The answer is:  " 4, 096 horses " .
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Hope this helps you!
 Wishing you the best!
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