וַיִּזְרַ֤ע יִצְחָק֙ בָּאָ֣רֶץ הַהִ֔וא וַיִּמְצָ֛א בַּשָּׁנָ֥ה הַהִ֖וא מֵאָ֣ה שְׁעָרִ֑ים וַֽיְבָרֲכֵ֖הוּ יְהוָֽה׃
이삭이 그 땅에서 농사하여 그 해에 백배나 얻었고 여호와께서 복을 주시므로
Rashi
בארץ ההוא IN THAT LAND although it (Gerar) had not the sacred importance of Erez Yisroel proper — i. e., as the territory of the seven nations, and is therefore not as fertile as the Holy Land (cf. Ketubot 112a).
Chizkuni
מאה שערים, Rashi writes that our sages said that the meaning of the expression (שער(ים here is “estimate” for the sake of tithing. [Either, according to Onkelos,] Yitzchok’s harvest was 100 times as much as could be expected, or that he had to tithe 100 times as much as he had expected.
Rashbam
בארץ ההיא, even though the soil of this land is exceptionally hard;