A dolphin swims 50 kilometers per hour, and a blue whale swims slower (3/10) than a sea peck. How many kilometers per hour does a blue whale swim?
海豚每小时游50千米，蓝鲸的速度比海啄慢(3/10)，蓝鲸每小时游多少千米？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">50 * (3/10)</gadget>
<output>15</output>

<gadget id="calculator">50 - 15</gadget>
<output>35</output>

<result>35</result>