87*((1/47)-(1/71))+16*((1/71)+(1/97))-71*((1/47)-(1/97))=how much.
87*((1/47)-(1/71))+16*((1/71)+(1/97))-71*((1/47)-(1/97))=多少．
<gadget id="calculator">1 / 47</gadget>
<output>1/47 = around 0.021277</output>

<gadget id="calculator">1 / 71</gadget>
<output>1/71 = around 0.014085</output>

<gadget id="calculator">(1/47) - (1/71)</gadget>
<output>24/3_337 = around 0.007192</output>

<gadget id="calculator">87 * (24/3_337)</gadget>
<output>2_088/3_337 = around 0.625712</output>

<gadget id="calculator">1 / 97</gadget>
<output>1/97 = around 0.010309</output>

<gadget id="calculator">(1/71) + (1/97)</gadget>
<output>168/6_887 = around 0.024394</output>

<gadget id="calculator">16 * (168/6_887)</gadget>
<output>2_688/6_887 = around 0.390301</output>

<gadget id="calculator">(1/47) - (1/97)</gadget>
<output>50/4_559 = around 0.010967</output>

<gadget id="calculator">71 * (50/4_559)</gadget>
<output>3_550/4_559 = around 0.77868</output>

<gadget id="calculator">(2_688/6_887) - (3_550/4_559)</gadget>
<output>-125_714/323_689 = around -0.388379</output>

<gadget id="calculator">(2_088/3_337) + (-125_714/323_689)</gadget>
<output>1_082/4_559 = around 0.237333</output>

<result>1_082/4_559 = around 0.237333</result>