When the quotient of 2.5/0.12 is 20, what is the remainder?
2.5/0.12的商是20时，余数是多少．
<gadget id="calculator">0.12 * 20</gadget>
<output>2.4</output>

<gadget id="calculator">2.5 - 2.4</gadget>
<output>0.1</output>

<result>0.1</result>