Simple calculation 6.4*41.2+66.2*3.6.
简便计算6.4*41.2+66.2*3.6．
<gadget id="calculator">6.4 * 41.2</gadget>
<output>263.68</output>

<gadget id="calculator">66.2 * 3.6</gadget>
<output>238.32</output>

<gadget id="calculator">263.68 + 238.32</gadget>
<output>502</output>

<result>502</result>