total(values: List<Decimal>) (answer: Decimal) {
  answer = sum(values)
}

verify() (answer: Bool) {
  answer = total([]) == 0.0 and total([0.1, 0.2, -0.05]) == 0.25
}

add(left: Decimal, right: Decimal) (answer: Decimal) { answer = left + right }

subtract(left: Decimal, right: Decimal) (answer: Decimal) { answer = left - right }

multiply(left: Decimal, right: Decimal) (answer: Decimal) { answer = left * right }

divide(left: Decimal, right: Decimal) (answer: Decimal) { answer = left / right }

calculate(left: Decimal, right: Decimal) (answer: Decimal) {
  answer = (left * right + left) / right - left
}

scale(value: Decimal) (answer: Decimal) { answer = value * 2 }

scaled(values: List<Decimal>) (answer: Decimal) { answer = sum(scale, values) }

convert(value: Int) (answer: Decimal) { answer = value }

constants() (answer: List<Decimal>) {
  answer = [-0, -0.00, -9223372036854775808, 9223372036854775807, 1 + 2]
}