After updating the machine in a workshop, a total of 261 kilowatt-hours of electricity was saved in 9 days. How many kilowatt-hours of electricity is saved on average every day?
某车间更新机器后，9天共节约用电261千瓦时，平均每天节约用电多少千瓦时？
<gadget id="calculator">261 / 9</gadget>
<output>29</output>

<result>29</result>