A certain school enrolled 700 students last year and 840 students this year. What is the increase in the number of students enrolled this year compared to last year?
某校去年招生700人，今年招生840人，今年招生人数比去年增加多少
<gadget id="calculator">840 - 700</gadget>
<output>140</output>

<gadget id="calculator">140 / 700</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>