There were 1,000 kilograms of watermelons in the fruit shop. After 50% of the watermelons were sold, 50% of the remaining weight was shipped in. At this time, how many kilograms of watermelons are there in the fruit shop?
水果店里原有西瓜1000千克，售出50%后，又运进剩下重量的50%，这时，水果店里还有西瓜多少千克．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1_000 * (1/2) * (3/2)</gadget>
<output>750</output>

<result>750</result>