There are 45 students in the fifth grade participating in the mathematics interest group, which is 10% less than the number participating in the writing group. How many people participate in the writing group?
五年级的同学参加数学兴趣小组的有45人，比参加写作小组的人数少10%，参加写作小组的有多少人？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

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

<result>50</result>