The fourth grade of Dacheng Experimental School has 3 classes with 42 students in each class, and the fifth grade has 2 classes with 43 students in each class. How many more students are there in the fourth grade than in the fifth grade?
大成实验学校四年级有3个班，每个班42人，五年级有2个班，每个班43人，四年级比五年级多多少学生？
<gadget id="calculator">42 * 3</gadget>
<output>126</output>

<gadget id="calculator">43 * 2</gadget>
<output>86</output>

<gadget id="calculator">126 - 86</gadget>
<output>40</output>

<result>40</result>