Radiation heat transfer - mistake in attached solution?

[pyroknife]

I attached the problem of interest (probably the only part you guys need to see is the equations at the bottom).

My answers are off by a magnitude of 10 compared to the solutions. (copy and pasted it below since the pic is a little hard to see at the bottom)
q = σε f*A(T^4 − Ts^4 )
= 5.67 Χ 10^−8 Χ ε Χ 1 Χ (π Χ 0.1^2 )(T^4 − 77^4 )

= 1.7813 Χ 10 −8 ε (T^4 − 77^4 )

When they did 5.67*10^-8 * 1 * pi * (.1)^2, they got 1.7813*10^-8.
I plugged that into my calculator, but I got 1.7813*10^-9.

Normally, I would think this was a typo, but in the next part (not included in image), they plotted values that were a magnitude of 10 different from mine. This has me thinking that I might have missed something.

What do you guys think?

 

[AvroArrow]

Am I missing something or is it a typo? It's likely that you are missing something. The equation you posted can be written as q = σε f*A(T^4 − Ts^4 ), where σ is the Stefan-Boltzmann constant, ε is the emissivity, f is the view factor, A is the area of the surface, T is the temperature, and Ts is the temperature of the surroundings. By substituting in the appropriate values for each variable, one can arrive at the solution given. It's possible that you made an error when substituting in one of the values.