What are the two steps to solving a proportion

Since the cross-products are equal to each other, the two ratios are equivalent.

...

Look at the proportion on the right.

Solve it. (You may use the calculator below.)

Then enter your answer and press the "Enter" or "Return" key on your keyboard.

Press the "New problem" button to get a new problem.

the answer to the expression is 83

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.