a 14 cm long wire is to be cut into two pieces so that one piece will be 2 / 5 th of the other , how many centimeters will the shorter piece be ?
"1 : 2 / 5 = 5 : 2 2 / 7 * 14 = 4 answer : e"
subtract(14, divide(14, add(divide(2, 5), const_1)))