The fruit shop sold 45,500 grams of fruit on the first day, 15 kg less on the second day than on the first day, and 21.5 kg more on the third day than the second day. How many kilograms of fruit were sold in three days?
水果店第一天卖出水果45500克，第二天比第一天少卖出15千克，第三天比第二天多卖出21.5千克．三天共卖出水果多少千克？
<gadget id="calculator">45_500 - 15</gadget>
<output>45_485</output>

<gadget id="calculator">45_485 + 21.5</gadget>
<output>45_506.5</output>

<gadget id="calculator">45_485 + 45_506.5 + 45_500</gadget>
<output>136_491.5</output>

<result>136_491.5</result>