42
x31
------
1 42
+1260
---------
1302
Step 1: 1×2 then 1×4
Step 2: 3×2 then 3×4
Step 3: Solve and for 2nd colum add a place holder
Step 4: Carry the regrouped number
Step 5: Do the same with the next problem
Step 6: If needed add the 2 products together