There used to be 30 boats in the People's Park, with a daily income of 540 yuan. Now there are 15 more boats than before, how much is the daily income now?
人民公园原来有30条船，每天收入540元．现在比原来多15条船，现在每天收入多少元？
<gadget id="calculator">540 / 30</gadget>
<output>18</output>

<gadget id="calculator">15 + 30</gadget>
<output>45</output>

<gadget id="calculator">18 * 45</gadget>
<output>810</output>

<result>810</result>