aarti can do a piece of work in 3 days . in how many days will she complete 10 time of work of same type ?
"we have the important relation , more work , more time ( days ) a piece of work can be done in 3 days . 10 times of work of same type can be done in 3 x 10 = 30 days answer d"
multiply(const_3, 3)