Little Ding Ding needs to practice writing 270 brush characters, and after 5 days of writing, there are still 105 left. How many brush characters do you write on average every day?
小丁丁要练习写270个毛笔字，写了5天后还剩下105个，平均每天写了多少个毛笔字？
<gadget id="calculator">270 - 105</gadget>
<output>165</output>

<gadget id="calculator">165 / 5</gadget>
<output>33</output>

<result>33</result>