8642-7531+6420-5317+4280-3157+2084-1753=how many.
8642-7531+6420-5317+4280-3157+2084-1753=多少．
<gadget id="calculator">8_642 - 7_531</gadget>
<output>1_111</output>

<gadget id="calculator">6_420 - 5_317</gadget>
<output>1_103</output>

<gadget id="calculator">4_280 - 3_157</gadget>
<output>1_123</output>

<gadget id="calculator">2_084 - 1_753</gadget>
<output>331</output>

<gadget id="calculator">1_111 + 1_103 + 1_123 + 331</gadget>
<output>3_668</output>

<result>3_668</result>