Calculation: 53*57-47*43=how much.
计算：53*57-47*43=多少．
<gadget id="calculator">53 * 57</gadget>
<output>3_021</output>

<gadget id="calculator">47 * 43</gadget>
<output>2_021</output>

<gadget id="calculator">3_021 - 2_021</gadget>
<output>1_000</output>

<result>1_000</result>