The school bought 50 desks at 85 yuan each, and 50 chairs at 45 yuan each. How much did it cost in total? Please use two different methods to calculate.
学校买来50张课桌，每张85元，还买来50把椅子，每把45元，一共花了多少元钱？请你用两种不同的方法计算．
<gadget id="calculator">85 * 50</gadget>
<output>4_250</output>

<gadget id="calculator">45 * 50</gadget>
<output>2_250</output>

<gadget id="calculator">4_250 + 2_250</gadget>
<output>6_500</output>

<result>6_500</result>