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Multiply by 1-digit numbers with standard algorithm


Don starts to use the standard algorithm to solve 418, times, 5. His work is shown below.
41y8×    50\begin{aligned} {\overset{}4}\overset{\blueD{y}}1\overset{}8&\\ \underline{{} \times \phantom{~~~~} 5}&\\ 0& \end{aligned}
What number should Don replace start color #11accd, y, end color #11accd with?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text