(1/2)*(2/3)*(3/4)...*(99/100)*(100/101);((1+3+5+7+...+199)/(2+4 +6+8+...+200)).
(1/2)*(2/3)*(3/4)…*(99/100)*(100/101)；((1+3+5+7+…+199)/(2+4+6+8+…+200))．
<gadget id="calculator">1 + 199</gadget>
<output>200</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">200 * 50</gadget>
<output>10_000</output>

<gadget id="calculator">2 + 200</gadget>
<output>202</output>

<gadget id="calculator">202 * 50</gadget>
<output>10_100</output>

<gadget id="calculator">10_000 / 10_100</gadget>
<output>100/101 = around 0.990099</output>

<result>100/101 = around 0.990099</result>