man saw a flock of sheep on the mountain, and he said to himself: "If I have these sheep, add these sheep, then add half of these sheep, add half of these sheep, and finally add my family's sheep." There are 100 sheep in total." How many sheep are there in the flock on the mountain?
一人看见山上有一群羊，他自言自语道："我如果有这些羊，再加上这些羊，然后加上这些羊的一半，又加上这些羊一半的一半，最后再加上我家里的那一只，一共有100只羊"．山上的羊群共有多少只．
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + 1 + (1/2) + (1/4)</gadget>
<output>11/4 = around 2.75</output>

<gadget id="calculator">99 / (11/4)</gadget>
<output>36</output>

<result>36</result>