At 8:00 on June 10, 2012, the water level of Jiujiang Port was 17.75m. At this time, the water level of Yichang Port was 7.79m less than three times the water level of Jiujiang Port. How many meters was the water level of Yichang Port at this time?
2012年6月10日8时，九江港口的水位是17.75m，此时宜昌港口的水位比九江港口水位的3倍少7.79m，此时宜昌港口的水位是多少米？
<gadget id="calculator">17.75 * 3</gadget>
<output>53.25</output>

<gadget id="calculator">53.25 - 7.79</gadget>
<output>45.46</output>

<result>45.46</result>