In the formula 260/20, if the dividend is reduced by 10 times, how much should the divisor be reduced to keep the quotient unchanged?
在算式260/20中，如果被除数缩小10倍，要使商不变，除数应减少多少
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">20 - 2</gadget>
<output>18</output>

<result>18</result>