((1234+4567*7890)/(4568*7890-6656))=how much.
((1234+4567*7890)/(4568*7890-6656))=多少．
<gadget id="calculator">4_567 * 7_890</gadget>
<output>36_033_630</output>

<gadget id="calculator">1_234 + 36_033_630</gadget>
<output>36_034_864</output>

<gadget id="calculator">4_568 * 7_890</gadget>
<output>36_041_520</output>

<gadget id="calculator">36_041_520 - 6_656</gadget>
<output>36_034_864</output>

<gadget id="calculator">36_034_864 / 36_034_864</gadget>
<output>1</output>

<result>1</result>