34*5=170, if 34 remains unchanged and 5 becomes 15, what should be the product.
34*5=170，如果34不变，5变成15后，积应该是多少．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">34 * 15</gadget>
<output>510</output>

<result>510</result>