The quotient of 8.4/3.5 is 2, what is the remainder
8.4/3.5的商是2，余数是多少
<gadget id="calculator">3.5 * 2</gadget>
<output>7</output>

<gadget id="calculator">8.4 - 7</gadget>
<output>1.4</output>

<result>1.4</result>