((1+2+3+4+5+6+5+4+3+2+1)/(66666*66666))=how much.
((1+2+3+4+5+6+5+4+3+2+1)/(66666*66666))=多少．
<gadget id="calculator">1 + 2 + 3 + 4 + 5 + 6 + 5 + 4 + 3 + 2 + 1</gadget>
<output>36</output>

<gadget id="calculator">66_666 * 66_666</gadget>
<output>4_444_355_556</output>

<gadget id="calculator">36 / 4_444_355_556</gadget>
<output>1/123_454_321 = around 0</output>

<result>1/123_454_321 = around 0</result>