Guoloufang bought back a batch of coal and planned to burn 45 kilograms per day for 100 days. In fact, it burned for 90 days, how many kilograms was burned on average per day?
锅楼房购回一批煤，计划每天烧45千克，可以烧100天．实际上烧了90天，平均每天烧多少千克？
<gadget id="calculator">100 / 90</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">45 * (10/9)</gadget>
<output>50</output>

<result>50</result>