It is known that the product of two factors is 180.9, if one of the factors is 9, what is the other factor.
已知两个因数的积是180.9，如果其中一个因数是9，那另一个因数是多少．
<gadget id="calculator">180.9 / 9</gadget>
<output>20.1</output>

<result>20.1</result>