The quotient of 3.7/0.5 is 7, what is the remainder?
3.7/0.5的商为7，余数为多少．
<gadget id="calculator">0.5 * 7</gadget>
<output>3.5</output>

<gadget id="calculator">3.7 - 3.5</gadget>
<output>0.2</output>

<result>0.2</result>