The side length of a square is 10 centimeters, if the side length is reduced by 4 centimeters, how much square centimeters will its area be reduced?
一个正方形的边长是10厘米，如果边长减少4厘米，则它的面积减少多少平方厘米．
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<gadget id="calculator">100 - 36</gadget>
<output>64</output>

<result>64</result>