The number of heartbeats of a person changes with age. Adolescents have about 77 heartbeats per minute, which is less than babies (4/11). How many times per minute are babies?
人的心脏跳动次数随着年龄的变化而变化，青少年每分心跳约77次，比婴儿每分心跳次数少(4/11)，婴儿每分心跳多少次？
<gadget id="calculator">4 / 11</gadget>
<output>4/11 = around 0.363636</output>

<gadget id="calculator">1 - (4/11)</gadget>
<output>7/11 = around 0.636364</output>

<gadget id="calculator">77 / (7/11)</gadget>
<output>121</output>

<result>121</result>