[tex](4 \ times {10} ^ {3} ) \ times (2 \ times {10} ^ {2} )[ / tex][tex](4 \ times {10} ^ { 3} ) \ div (2 \ times {10} ^ {2} )[ / tex]?
[tex](4 \ times {10} ^ {3} ) \ times (2 \ times {10} ^ {2} )[ / tex] [tex](4 \ times {10} ^ { 3} ) \ div (2 \ times {10} ^ {2} )[ / tex] .