The school originally had 1,350 meters of red cloth, but bought another 460 meters, and used 321 meters to make the small red flag. How many meters are left?
学校原有红布料1350米，又买来460米，做小红旗用去321米，还剩几米？
<gadget id="calculator">460 - 321</gadget>
<output>139</output>

<gadget id="calculator">1_350 + 139</gadget>
<output>1_489</output>

<result>1_489</result>