There are 15 bags of fruit candies with the same number of pieces. If 12 pieces are taken out of each bag, the total number of fruit candies remaining is exactly equal to the number of pieces in the original 13 bags of sugar. How many pieces of sugar are there in each bag?
有15袋块数相等的水果糖，如果从每袋中取出12块，剩下水果糖的总块数恰好等于原来13袋糖的块数．原来每袋糖有多少块？
<gadget id="calculator">15 - 13</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<result>90</result>