Calculation: 34*3535-35*3434.
计算：34*3535-35*3434．
<gadget id="calculator">34 * 3_535</gadget>
<output>120_190</output>

<gadget id="calculator">35 * 3_434</gadget>
<output>120_190</output>

<gadget id="calculator">120_190 - 120_190</gadget>
<output>0</output>

<result>0</result>