There are 3 classes in the fifth grade of the Experimental Primary School. The first class has 42 students. How many students are there in total?
实验小学五年级有3个班，一班有42人，二班的人数是一班的(5/6)，二班的人数比三班人数的(2/5)倍少1人，五年级共有学生多少人？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">42 * (5/6)</gadget>
<output>35</output>

<gadget id="calculator">35 + 1</gadget>
<output>36</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">36 / (2/5)</gadget>
<output>90</output>

<gadget id="calculator">42 + 35 + 90</gadget>
<output>167</output>

<result>167</result>