One cantaloupe can be exchanged for 4 apples, five peaches can be exchanged for two apples, and one cantaloupe can be exchanged for how many peaches.
1个哈密瓜可换4个苹果，5个桃可换2个苹果，1个哈密瓜能换多少桃．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>