Problem: find the expenditure on digging a well 14 m deep and of 3 m diameter at rs . 14 per cubic meter ?
Rationale: "22 / 7 * 14 * 3 / 2 * 3 / 2 = 99 m 2 99 * 14 = 1386 answer : a"
annotated_formula: multiply(volume_cylinder(divide(3, const_2), 14), 14)