An enemy ship fled at a speed of 400 meters per minute at a distance of 5.5 kilometers from our coastal defense post. Our speedboat immediately set off from the post and caught up with the enemy ship after sailing for 11 minutes. How many meters per branch of my speedboat?
一敌舰在离我海防哨5.5千米处，以每分400米的速度逃跑，我快艇立即从哨所出发，航行了11分就追上了敌舰．我快艇每分行多少米？
<gadget id="calculator">400 * 11</gadget>
<output>4_400</output>

<gadget id="calculator">5.5 * 1_000</gadget>
<output>5_500</output>

<gadget id="calculator">4_400 + 5_500</gadget>
<output>9_900</output>

<gadget id="calculator">9_900 / 11</gadget>
<output>900</output>

<result>900</result>