When the quotient of 1.7/0.5 is 3, what is the remainder?
1.7/0.5商是3时，余数是多少．
<gadget id="calculator">0.5 * 3</gadget>
<output>1.5</output>

<gadget id="calculator">1.7 - 1.5</gadget>
<output>0.2</output>

<result>0.2</result>