You change them into improper or topheavy fractions.
Its impossible you can change improper fractions into mixed number, but not 3490000...
Mixed fractions can be converted into improper fractions then changed back to a mixed number.
improper fraction
improper fraction
an improper fraction
Convert them to improper fractions and proceed the same way you would multiply two fractions.
You do the numerator divided by the denominator, then simplify the fractions if you can. (this is how you change a improper fraction to a mixed number, you cannot change a proper fraction to a mixed number)
improper fraction
Change them to improper fractions and double them.
you do what makes sense given the numbers, if the fractions work out beautifully, you can just leave them as mixed numbers, otherwise it's best to keep them as improper fractions
Change them into improper fractions. Invert the second fraction and multiply them together. Reduce if necessary.