Xiaoya measures the distance she walks 10 steps. She measured it 4 times, and the results were 4.7m, 5m, 5.1m, and 5.2m. Xiaoya has to walk 900 steps from her home to the school gate. How many meters is it from Xiaoya's house to the school gate?
小亚测量自己走10步的路程．她测了4次，结果分别是4.7m、5m、5.1m、5.2m．小亚从家出发走到学校门口要走900步．小亚家到学校门口大约是多少米？
<gadget id="calculator">4.7 + 5 + 5.1 + 5.2</gadget>
<output>20</output>

<gadget id="calculator">20 / 4 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 900</gadget>
<output>450</output>

<result>450</result>