Subject :NSO Class : Class 5

Multiply 4 tens 2 tenths 7 hundredths by 3. The result is _____.

(B) 126.21

(C) 120.81

(D) 128.1

I multiplied it manually and I got 12.81. I multiplied it by calculator then also I got 12.81. Please explain me how you got 120.81.