65*2000-64*2001.
65*2000-64*2001．
<gadget id="calculator">65 * 2_000</gadget>
<output>130_000</output>

<gadget id="calculator">64 * 2_001</gadget>
<output>128_064</output>

<gadget id="calculator">130_000 - 128_064</gadget>
<output>1_936</output>

<result>1_936</result>