During the earthquake in Yunnan, Big S saved 500 yuan of pocket money, and donated (7/10) of it to the disaster-stricken areas in Yunnan. How much did Big S donate?
云南地震，大S攒了500元的零花钱，拿出其中的(7/10)捐给了云南灾区，大S捐了多少钱？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">500 * (7/10)</gadget>
<output>350</output>

<result>350</result>