piece of chocolate is placed on the left end of the balance, and half of the same chocolate and a weight of 50 grams are placed on the right end. At this time, the balance is just balanced. How much does a bar of chocolate weigh in grams?
天平左端放着一块巧克力，右端放着同样的巧克力半块和50克的砝码，这时天平恰好平衡．一块巧克力的重量是多少克．
<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<result>100</result>