book Maths Puzzle Numerical Ability

Hello! My name is Lavalle. I am having trouble with multiplying/dividing decimals. Please help me.
5167 x 0.19
2.163 x 0.008
Please Help me, Thank You

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book Other Question

The number of barber jobs in 1998 is 54,000. In 2008 it is 50,000. The change is -4. What is th percent of the decrease? nuts are sold $15.00 per kg for cashews and pecans are $10.00 per kg. How many kg of each should be mixed in order to get 20kg worth $12.00 per kg?