there is enough provisions for 600 men in an army camp for 35 days . if there were 300 men less , how long will the provision last ?
"exp : we have , m 1 d 1 = m 2 d 2 600 * 35 = 300 * d 2 d 2 = 600 * 35 / 300 = 70 days . answer : d"
divide(multiply(600, 35), 300)