The rice professional group has two paddy fields, one is 450 square meters, with an average yield of 1.3 kilograms of rice per square meter; the other is 550 square meters, with an average yield of 1.45 kilograms of rice per square meter. What is the sum of the yields of the two paddy fields in kilograms?
水稻专业组有两块稻田，一块450平方米，平均每平方米产水稻1.3千克；另一块550平方米，平均每平方米产水稻1.45千克．这两块稻田的产量总和是多少千克？
<gadget id="calculator">450 * 1.3</gadget>
<output>585</output>

<gadget id="calculator">550 * 1.45</gadget>
<output>797.5</output>

<gadget id="calculator">585 + 797.5</gadget>
<output>1_382.5</output>

<result>1_382.5</result>