What is the number 1400 that is 15 times greater than 400?
比400的15倍多1400的数是多少．
<gadget id="calculator">400 * 15</gadget>
<output>6_000</output>

<gadget id="calculator">6_000 + 1_400</gadget>
<output>7_400</output>

<result>7_400</result>