It is known that 3:5=6:10, if the 6 in the ratio is changed to 9, then how much should 10 be changed to.
已知3：5=6：10，如果将比例中的6改为9，那么10应改为多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">9 / (3/5)</gadget>
<output>15</output>

<result>15</result>