[{"system_id":133657,"type":"personal","prices":{"7":{"min":0.05,"max":0.05,"avg":0.05,"sales":1},"14":{"min":0.05,"max":0.05,"avg":0.05,"sales":3},"30":{"min":0.03,"max":0.04,"avg":0.03,"sales":8}},"prices_updated_at":{"$date":"2022-05-25T04:48:43.469Z"}}]

db.collection.aggregate([{"$addFields":{"prices":{"$objectToArray":"$prices"}}},{"$addFields":{"prices":{$map:{input:"$prices",as:"p",in:{"k":"$$p.k","v":{"min":{$multiply:["$$p.v.min",2]},"max":{$multiply:["$$p.v.max",2]},"avg":{$multiply:["$$p.v.avg",2]},"sales":"$$p.v.sales"}}}}}},{"$addFields":{"prices":{"$arrayToObject":"$prices"}}}])