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例:程跃同学用调好的天平称量一个梨的质量,待天平平衡后,发现右盘砝码的总质量为150克,游码指的刻度值为0.4克,则这个梨的质量为____。
Example: Cheng Yue students with a good balance weighing a pear quality until balance balance, we found that the weight of the right side of the weight of the total weight of 150 grams, 0.4 grams of travel code refers to the scale, then the quality of this pear ____.