Subtract 125 from 1000, add 120, subtract 125, add 120... This keeps subtracting, how many 125 to subtract, the result is 0.
从1000里减去125，再加120，再减去125，再加120…这样一直减下去，要减去多少个125，结果是0．
<gadget id="calculator">1_000 - 125</gadget>
<output>875</output>

<gadget id="calculator">125 - 120</gadget>
<output>5</output>

<gadget id="calculator">875 / 5</gadget>
<output>175</output>

<gadget id="calculator">175 + 1</gadget>
<output>176</output>

<result>176</result>