78/26=3, when the dividend is reduced by 18, how much should the divisor be reduced to keep the quotient unchanged.
78/26=3，当被除数减少18时，要使商不变，除数应减少多少．
<gadget id="calculator">78 - 18</gadget>
<output>60</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">26 - 20</gadget>
<output>6</output>

<result>6</result>