A square plank is cut off by 15 cm on one side and 10 cm on the other side, and the area of the remaining plank is reduced by 1750 square centimeters from the original area. Then, what is the side length of the original square plank in centimeters?
一块正方形木板，一边截去15厘米，另一边截去10厘米，剩下的木板的面积比原来的面积减少了1750平方厘米，那么，原来正方形木板的边长是多少厘米
<gadget id="calculator">15 * 10</gadget>
<output>150</output>

<gadget id="calculator">150 + 1_750</gadget>
<output>1_900</output>

<gadget id="calculator">15 + 10</gadget>
<output>25</output>

<gadget id="calculator">1_900 / 25</gadget>
<output>76</output>

<result>76</result>