Calculation: 8457-(7630-4578)+(7845-3076)-(6307-5784)-763.
计算：8457-(7630-4578)+(7845-3076)-(6307-5784)-763．
<gadget id="calculator">7_630 - 4_578</gadget>
<output>3_052</output>

<gadget id="calculator">8_457 - 3_052</gadget>
<output>5_405</output>

<gadget id="calculator">7_845 - 3_076</gadget>
<output>4_769</output>

<gadget id="calculator">6_307 - 5_784</gadget>
<output>523</output>

<gadget id="calculator">4_769 - 523 - 763</gadget>
<output>3_483</output>

<gadget id="calculator">5_405 + 3_483</gadget>
<output>8_888</output>

<result>8_888</result>