((1+2+3+4+5+6+7+8+7+6+5+4+3+2+1)/(8*8*8*8))=how much.
((1+2+3+4+5+6+7+8+7+6+5+4+3+2+1)/(8*8*8*8))=多少．
<gadget id="calculator">1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1</gadget>
<output>64</output>

<gadget id="calculator">8 * 8 * 8 * 8</gadget>
<output>4_096</output>

<gadget id="calculator">64 / 4_096</gadget>
<output>1/64 = around 0.015625</output>

<result>1/64 = around 0.015625</result>