After removing 400 grams from a bag of flour, 4600 grams remain, what is the original kilogram of this bag of flour?
一袋面粉取走400克后，还剩4600克，这袋面粉原有多少千克．
<gadget id="calculator">400 + 4_600</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 / 1_000</gadget>
<output>5</output>

<result>5</result>