4.8/1.6=3, the divisor is reduced by 0.8. To keep the quotient unchanged, the dividend should be reduced by _how much
4.8/1.6=3，除数减少0.8，要使商不变，被除数应减少_多少
<gadget id="calculator">0.8 * 3</gadget>
<output>2.4</output>

<result>2.4</result>