When Xiao Zhang started to learn to type, he could only type 13 words per minute, but now he can type 12 times that at the beginning.
小张开始学打字时，每分钟只能打字13个，现在每分钟打字的个数是开始时的12倍，小张现在每分钟比开始学打字时多了多少个字？
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">13 * 11</gadget>
<output>143</output>

<result>143</result>