there is enough provisions for 600 men in an army camp for 25 days . if there were 100 men less , how long will the provision last ?
"exp : we have , m 1 d 1 = m 2 d 2 600 * 25 = 100 * d 2 d 2 = 600 * 25 / 100 = 150 days . answer : d"
divide(multiply(600, 25), 100)