Xiao Ming writes a diary every day, and he needs to write 120 entries. Please estimate how many months it will take.
小明每天写一篇日记，他要写120篇，请你估算一下，大约需要多少个月．
<gadget id="calculator">30 * 1</gadget>
<output>30</output>

<gadget id="calculator">120 / 30</gadget>
<output>4</output>

<result>4</result>