A diamond cutter has raw carats diamond that weighs 19.5 and from which two 5-carats diamonds will be cutHow much did the raw diamond weigh in milligramsHow much will each of two cut diamonds way in milligrams

Remember that
carats=ct
1 ct=200 mg
so
19.5 ct-----> convert to mg
19.5 ct=19.5*200=3,900 mg
5 ct -----> convert to mg
5 ct=5*200=1,000 mg