There are 49 chickens and rabbits with a total of 100 paws. How many chickens are there?
鸡兔共49只，共100个爪子，鸡有多少只．
<gadget id="calculator">49 * 4</gadget>
<output>196</output>

<gadget id="calculator">196 - 100</gadget>
<output>96</output>

<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<gadget id="calculator">96 / 2</gadget>
<output>48</output>

<result>48</result>