Simple calculation: 1-(1/8)-(1/16)-(1/32)-(1/64).
简便计算：1-(1/8)-(1/16)-(1/32)-(1/64)．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">1 / 32</gadget>
<output>1/32 = around 0.03125</output>

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

<gadget id="calculator">1 - (1/8) - (1/16) - (1/32) - (1/64)</gadget>
<output>49/64 = around 0.765625</output>

<result>49/64 = around 0.765625</result>