A recipe that I am trying says that it's very important I follow the instructions to the letter. However, at one point it says "Each loaf should bake at 300 degrees Fahrenheit in convection/steam oven for approximately 40 minutes or until the loaf reaches 155 degrees internal temperature."  However, I only have a Normal Oven, not a convection/steam oven. Can I still cook this recipe? Or, do I need to buy a new oven? 
I like to use the 15% rule.  To convert a recipe from convection to conventional:   Multiply the cook time by 1.15. Multiply the heat by 1.15   For example, your recipe would become:  "Each loaf should bake at (300*1.15 = 345) degrees Fahrenheit in convection/steam oven for approximately (40*1.15=46) minutes or until the loaf reaches 155 degrees internal temperature."  You can convert back by multiplying by .85. 