The product of the two inner terms in a ratio is 15, the outer term is 2, what is the other outer term
一个比例中两个内项的积是15，一个外项是2，另一外项是多少
<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>