On Sunday, Xiaoxiao went to her grandmother's house and took a bus at 9:00 a.m. at a speed of 75 km/h. After 2:00 a.m., Xiaoxiao walked to her grandma's house for 30 minutes at a speed of 6 km/h. How far is the distance between Xiaoxiao's house and grandma's house?
星期天，晓晓去外婆家，上午9点坐上了一辆速度为75千米/时的公共汽车，2时后，晓晓又以6千米/时的速度步行30分到达外婆家．晓晓家和外婆家相距多远？
<gadget id="calculator">75 * 5</gadget>
<output>375</output>

<gadget id="calculator">6 * 0.5</gadget>
<output>3</output>

<gadget id="calculator">375 + 3</gadget>
<output>378</output>

<result>378</result>