The toy factory originally planned to produce 1,820 toys in 5 days, but actually produced 91 more toys per day than the original plan. How many days did it actually take?
玩具厂原计划5天生产玩具1820个，实际每天比原计划多生产91个．实际用了多少天？
<gadget id="calculator">1_820 / 5</gadget>
<output>364</output>

<gadget id="calculator">364 + 91</gadget>
<output>455</output>

<gadget id="calculator">1_820 / 455</gadget>
<output>4</output>

<result>4</result>