In 13.5/7 what is the remainder when the quotient is 1.9
在13.5/7中，当商是1.9时，余数是多少
<gadget id="calculator">1.9 * 7</gadget>
<output>13.3</output>

<gadget id="calculator">13.5 - 13.3</gadget>
<output>0.2</output>

<result>0.2</result>