Calculator, Calculator

Calculator, calculator,
help me with my math.
Help me do my homework
or I'll feel the teacher's wrath1.
Calculator, calculator,
add these numbers quick.
Truly you're a wizard
with this tough arithmetic.
Calculator, calculator,
multiply, divide.
Decimals, percentages;
you solve them all with pride.
Calculator, calculator,
don't be such a jerk.
Thank you for the answers
but you have to show your work.