To build a road with a length of 3600 meters, the full length (4/9) was built on the first day, how many meters were built on the first day?
修一条长3600米的路，第一天修了全长的(4/9)，第一天修了多少米？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">3_600 * (4/9)</gadget>
<output>1_600</output>

<result>1_600</result>