Problem: if a lends rs . 1200 to b at 10 % per annum and b lends the same sum to c at 18 % per annum then the gain of b in a period of 2 years is ?
Rationale: "( 1200 * 8 * 2 ) / 100 = > 192 answer : c"
annotated_formula: subtract(divide(multiply(multiply(1200, 18), 2), const_100), divide(multiply(multiply(1200, 10), 2), const_100))