Question

If an industrial machine could make 418 pencils in a second, how many pencils would it have made in 15 seconds?

Answer 1

to find this you have to multiply the amount of pencils by the amount of seconds
418x15=6270 pencils

Answer 2

Easy, just do 418*15, which is 6270.

You can also do a proportion:
418/1=x/5
x=418*15
x=6270

:)