应用: 计算器
任务: 打开计算器应用，切换到单位转换，选择‘华氏→摄氏’，输入‘212’
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: CLICK
step_id: 5
action: CLICK